我一直在用我的PHP脚本读取一些EXIF数据。我想确定某个图像是否已使用闪光灯。这是EXIF阅读器返回的值
0x0 = No Flash
0x1 = Fired
0x5 = Fired, Return not detected
0x7 = Fired, Return detected
0x8 = On, Did not fire
0x9 = On, Fired
0xd = On, Return not detected
0xf = On, Return detected
0x10 = Off, Did not fire
0x14 = Off, Did not fire, Return not detected
0x18 = Auto, Did not fire
0x19 = Auto, Fired
0x1d = Auto, Fired, Return not detected
0x1f = Auto, Fired, Return detected
0x20 = No flash function
0x30 = Off, No flash function
0x41 = Fired, Red-eye reduction
0x45 = Fired, Red-eye reduction, Return not detected
0x47 = Fired, Red-eye reduction, Return detected
0x49 = On, Red-eye reduction
0x4d = On, Red-eye reduction, Return not detected
0x4f = On, Red-eye reduction, Return detected
0x50 = Off, Red-eye reduction
0x58 = Auto, Did not fire, Red-eye reduction
0x59 = Auto, Fired, Red-eye reduction
0x5d = Auto, Fired, Red-eye reduction, Return not detected
0x5f = Auto, Fired, Red-eye reduction, Return detected
其中哪一个表示已使用闪光灯？
此致，
姆拉乔
最佳答案
我相信，如果将十六进制值转换为二进制值，那么最右边的数字将指示闪光灯是否实际闪光。
所以:
+-------------------------------------------------------+------+----------+-------+
| Status | Hex | Binary | Fired |
+-------------------------------------------------------+------+----------+-------+
| No Flash | 0x0 | 00000000 | No |
| Fired | 0x1 | 00000001 | Yes |
| "Fired, Return not detected" | 0x5 | 00000101 | Yes |
| "Fired, Return detected" | 0x7 | 00000111 | Yes |
| "On, Did not fire" | 0x8 | 00001000 | No |
| "On, Fired" | 0x9 | 00001001 | Yes |
| "On, Return not detected" | 0xd | 00001011 | Yes |
| "On, Return detected" | 0xf | 00001111 | Yes |
| "Off, Did not fire" | 0x10 | 00010000 | No |
| "Off, Did not fire, Return not detected" | 0x14 | 00010100 | No |
| "Auto, Did not fire" | 0x18 | 00011000 | No |
| "Auto, Fired" | 0x19 | 00011001 | Yes |
| "Auto, Fired, Return not detected" | 0x1d | 00011101 | Yes |
| "Auto, Fired, Return detected" | 0x1f | 00011111 | Yes |
| No flash function | 0x20 | 00100000 | No |
| "Off, No flash function" | 0x30 | 00110000 | No |
| "Fired, Red-eye reduction" | 0x41 | 01000001 | Yes |
| "Fired, Red-eye reduction, Return not detected" | 0x45 | 01000101 | Yes |
| "Fired, Red-eye reduction, Return detected" | 0x47 | 01000111 | Yes |
| "On, Red-eye reduction" | 0x49 | 01001001 | Yes |
| "On, Red-eye reduction, Return not detected" | 0x4d | 01001101 | Yes |
| "On, Red-eye reduction, Return detected" | 0x4f | 01001111 | Yes |
| "Off, Red-eye reduction" | 0x50 | 01010000 | No |
| "Auto, Did not fire, Red-eye reduction" | 0x58 | 01011000 | No |
| "Auto, Fired, Red-eye reduction" | 0x59 | 01011001 | Yes |
| "Auto, Fired, Red-eye reduction, Return not detected" | 0x5d | 01011101 | Yes |
| "Auto, Fired, Red-eye reduction, Return detected" | 0x5f | 01011111 | Yes |
+-------------------------------------------------------+------+----------+-------+
关于php - 读取EXIF并确定闪光灯是否闪光，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/7076958/